Knee joint for prosthesis



FIG. 1 is a front elevation of a knee joint for prosthesis showing my new design;

FIG. 2 is a rear elevation thereof;

FIG. 3 is a left side elevation thereof

FIG. 4 is a right side elevation thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom perspective view thereof; and,

FIG. 7 is a top and front perspective view thereof.

The broken line showing of portions of the design is for illustrative purpose only and form no part of the claimed design. 

I claim the ornamental design for a knee joint for prosthesis, as shown and described. 